Purpose - Facilitating knowledge sharing within organisations is a difficult task: the willingness of individuals to share and integrate their knowledge is one of the central barriers. This paper aims to develop a motivation-based perspective to explore how organisations resolve the social dilemma of knowledge sharing. Design/methodology/approach - The analysis builds on a three-category taxonomy of motivation, adding "hedonic" motivation to the traditional dichotomy of "extrinsic" and "intrinsic" motivation. It uses case studies gleaned from the literature to explore the interactive effects between the different motivators in two different types of knowledge-intensive organisations.. professional bureaucracy and operating adhocracy. Find...